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diff src/cpu/sparc/vm/vm_version_sparc.cpp @ 6610:f99a36499b8c

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7192128: G1: Extend fix for 6948537 to G1's BOT Summary: G1 does not appear to be immune to the issue described in CR 6948537 and increasing the size of old-generation PLABs appears to increase the liklihood of seeing the issue. Extend the fix for 6948537 to G1's BlockOffsetTable. Reviewed-by: brutisso, jmasa
author johnc
date Tue, 21 Aug 2012 10:05:57 -0700
parents 8c92982cbbc4
children 7eca5de9e0b6
line wrap: on
line diff
--- a/src/cpu/sparc/vm/vm_version_sparc.cpp	Fri Aug 17 15:41:04 2012 -0700
+++ b/src/cpu/sparc/vm/vm_version_sparc.cpp	Tue Aug 21 10:05:57 2012 -0700
@@ -106,10 +106,10 @@
     if (FLAG_IS_DEFAULT(OptoLoopAlignment)) {
       FLAG_SET_DEFAULT(OptoLoopAlignment, 4);
     }
-    // When using CMS, we cannot use memset() in BOT updates because
-    // the sun4v/CMT version in libc_psr uses BIS which exposes
-    // "phantom zeros" to concurrent readers. See 6948537.
-    if (FLAG_IS_DEFAULT(UseMemSetInBOT) && UseConcMarkSweepGC) {
+    // When using CMS or G1, we cannot use memset() in BOT updates
+    // because the sun4v/CMT version in libc_psr uses BIS which
+    // exposes "phantom zeros" to concurrent readers. See 6948537.
+    if (FLAG_IS_DEFAULT(UseMemSetInBOT) && (UseConcMarkSweepGC || UseG1GC)) {
       FLAG_SET_DEFAULT(UseMemSetInBOT, false);
     }
 #ifdef _LP64